Gallons to Liters
( gal → L )
Instantly convert US gallons to liters. Enter any value below and get an accurate result with the full formula and reference table.
How to Convert Gallons to Liters
To convert US gallons to liters, multiply the number of gallons by 3.78541. This factor comes from the definition of a gallon in the US customary system: 1 gal = 231 cubic inches, and 1 cubic inch = 16.387064 mL.
Step-by-Step Example
Let’s convert 2 gallons to liters:
1. Multiply by 3.78541: 2 × 3.78541 = 7.57082
2. So 2 gallons equals approximately 7.571 L.
For a smaller amount, 0.5 gallon × 3.78541 = 1.892705 L.
When You’d Use Each Unit
Gallons are commonly used in the US for measuring large volumes of liquids like gasoline, milk, or water. Liters are the standard metric unit for volume and are used worldwide for larger quantities, such as beverages, fuel, and containers. Converting between them is essential for understanding product volumes, fuel efficiency, and international recipes.
Common gallons values converted to liters — typical values highlighted.
| Gallons (gal) | Liters (L) | Approximate |
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